Measuring accelerating universe with high-redshift GRBs data and other cosmological probes  

作　　者：LU JianBo WANG YuTing WU YaBo 

机构地区：[1]Department of Physics, Liaoning Normal University, Dalian 116029, China [2]School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2012年第9期1713-1719,共7页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.11147150,11175077 and 11005088);the Natural Science Foundation of Education Department of Liaoning Province (Grant No. L2011189);the Natural Science Foundation of Liaoning Province,China (Grant No.20102124)

摘　　要：A kinematical model （a parameterized deceleration parameter） and a dynamical model （a parameterized equation of state for dark energy） are constrained from the current observational data including the high-redshift Gamma-Ray Bursts （GRBs） data with a redshift range from 1.4 to 9. We obtain the stringent constraint on the values of current deceleration parameter q0, current jerk parameter j0, current equation of state for dark energy Woae and transition redshift zT. In addition, we compare the difference of the constraint results between the kinematical and the dynamical scenarios.A kinematical model(a parameterized deceleration parameter) and a dynamical model(a parameterized equation of state for dark energy) are constrained from the current observational data including the high-redshift Gamma-Ray Bursts(GRBs) data with a redshift range from 1.4 to 9.We obtain the stringent constraint on the values of current deceleration parameter q 0,current jerk parameter j 0,current equation of state for dark energy w 0de and transition redshift z T.In addition,we compare the difference of the constraint results between the kinematical and the dynamical scenarios.

关 键 词：Gamma-Ray Bursts （GRBs） kinematical approach dynamical approach 

分 类 号：P172.3[天文地球—天文学] P158